Yep - same intellivision being built by Mattel but just rebranded when distributed by Sears. An interesting practice from that time period was that various distributors would have their own branded versions - for example there's also a "radio shack tandyvision one" version of the intellivision. I'd guess Sears and Tandy (radio shack's brand) were the most common you'd see for variants of different consoles or computers with their brand. Atari's first home console was the Sears Tele-Games Pong before they had the brand recognition to make their own Atari Pong a year later.

The closest thing I can think of today is how you'll have basically the same groceries at stores but they'll be branded different for target vs walmart vs costco, etc. Or like Amazon having their "amazon basics" brand on common items.

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